Malicious PDF — malware analysis report

Static analysis result for SHA-256 66622ce3190ab882…

MALICIOUS

PDF

45.3 KB Created: 2020-11-09 07:29:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: e81cce52e1c682098eee747d0080bec3 SHA-1: 980f96c55a0e83d802973cd4e4b04da15b223f82 SHA-256: 66622ce3190ab882105f72d1395539140035f00704f064ff82958aa6957d8172
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains references to URLs, suggesting a link farm or redirection scheme designed to lead users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ggtraff.ru/123?keyword=mech+arena+game In PDF document text
    • https://cdn-cms.f-static.net/uploads/4471467/normal_5fa890e2272e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470524/normal_5fa87dde43221.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368228/normal_5f877a51af7aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367964/normal_5f9ae0f49f429.pdfIn PDF document text
    • https://buximinolid.weebly.com/uploads/1/3/1/3/131381316/7579397.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382638/normal_5f8e67d862f49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366660/normal_5f8eb272e8e5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369190/normal_5f91006eceec3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367633/normal_5f875674673e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373992/normal_5f94f24b5588c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/86f97e8f-a9d0-4b52-b02d-1e39d19e08e5/65895018257.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8932028-ec62-4747-ab2e-f8c2fc3d96c4/tojobusef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80aa8661-84fc-4508-a41d-614afa069366/vipokeredoropofojunitun.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000733a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x733A 5008 bytes
SHA-256: 24e7ab767c2584be56149a6ce1d2e0c4059be55b1444b20e52767e9cfd2cd018
font_01_sfnt_off00008428.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8428 10716 bytes
SHA-256: a61e0a54cc33e3486712a06912948822aa080c012f837479c8eb231fbe28dcc5

Open this report in the interactive analyzer, or submit your own file for analysis.